﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DirectSell.Common
{
        /// <summary>
        /// 实体类、字符串互相转换
        /// </summary>
        public static class TransModel<T>
        {
            /// <summary>
            /// 将实体类通过反射组装成字符串
            /// </summary>
            /// <param name="t">实体类</param>
            /// <returns>组装的字符串</returns>
            public static string GetEntityToString(T t)
            {
                System.Text.StringBuilder sb = new StringBuilder();
                Type type = t.GetType();
                if (type.Name == "String")
                {
                  return t as string;
                }
                System.Reflection.PropertyInfo[] propertyInfos = type.GetProperties();
                for (int i = 0; i < propertyInfos.Length; i++)
                {
                    sb.Append(propertyInfos[i].Name + ":" + propertyInfos[i].GetValue(t, null) + ",");
                }
                return sb.ToString().TrimEnd(new char[] { ',' });
            }
            /// <summary>
            /// 将反射得到字符串转换为对象
            /// </summary>
            /// <param name="str">反射得到的字符串</param>
            /// <returns>实体类</returns>
            public static T GetEntityStringToEntity(string str)
            {
                string[] array = str.Split(',');
                string[] temp = null;
                Dictionary<string, string> dictionary = new Dictionary<string, string>();
                foreach (string s in array)
                {
                    temp = s.Split(':');
                    dictionary.Add(temp[0], temp[1]);
                }
                System.Reflection.Assembly assembly = System.Reflection.Assembly.GetAssembly(typeof(T));
                T entry = (T)assembly.CreateInstance(typeof(T).FullName);
                System.Text.StringBuilder sb = new StringBuilder();
                Type type = entry.GetType();
                System.Reflection.PropertyInfo[] propertyInfos = type.GetProperties();
                for (int i = 0; i < propertyInfos.Length; i++)
                {
                    foreach (string key in dictionary.Keys)
                    {
                        if (propertyInfos[i].Name == key.ToString())
                        {
                            propertyInfos[i].SetValue(entry, GetObject(propertyInfos[i], dictionary[key]), null);
                            break;
                        }
                    }
                }
                return entry;
            }
            /// <summary>
            /// 转换值的类型
            /// </summary>
            /// <param name="p"></param>
            /// <param name="value"></param>
            /// <returns></returns>
            static object GetObject(System.Reflection.PropertyInfo p, string value)
            {
                switch (p.PropertyType.Name.ToString().ToLower())
                {
                    case "int16":
                        return Convert.ToInt16(value);
                    case "int32":
                        return Convert.ToInt32(value);
                    case "int64":
                        return Convert.ToInt64(value);
                    case "string":
                        return Convert.ToString(value);
                    case "datetime":
                        return Convert.ToDateTime(value);
                    case "boolean":
                        return Convert.ToBoolean(value);
                    case "char":
                        return Convert.ToChar(value);
                    case "double":
                        return Convert.ToDouble(value);
                    default:
                        return value;
                }
            }
        }
    }
